[TheWrongGrape]

I was able to solve this myself. Here's the solution in case anybody wants to do the same in 4.3.1:

In skin1/modules/Wishlist/wl_products.tpl add at the bottom after the form for sending the Wish List:

{if $login ne ""}Your public Wish List URL:<br/>
{$http_location}/cart.php?mode=friend_wl&wlid={php}
$wishlistid = $this->_tpl_vars[login];
echo md5($wishlistid);
{/php}

There may be a cleaner way to get that but it works for me as is.